Hot dipped high manganese steel and manufacturing method therefor
AssigneeBaoshan Iron & Steel Co., Ltd.
InventorsXinyan Jin, Yong Zhong, Guangkui Hu
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Abstract
A hot dipped high manganese steel and a manufacturing method therefor. The high manganese steel comprises a steel base plate and a coating on the surface of the steel base plate. The core of the steel base plate is austenite. The surface layer of the steel base plate is a ferrite fine grain layer. The ferrite fine grain layer comprises an oxide of Al. Furthermore, the steel base plate of the hot dipped high manganese steel comprises, in mass percentages, 10 to 30% of Mn element, 1 to 2% of Al element, and 0.4 to 0.8% of C element. The manufacturing method comprises: 1) manufacturing strip steel; 2) primary annealing and acid washing; 3) secondary annealing and hot dipping.
Claims21
A hot dipped high manganese steel, comprising a steel substrate and a coating on a surface of the steel substrate, wherein the steel substrate has a core structure of austenite;
- the steel substrate has a skin layer which is a fine ferrite grain layer;
- the fine ferrite grain layer comprises an Al oxide, wherein the steel substrate comprises 10 to 30% Mn, 1 to 2% Al and 0.4 to 0.8% C by mass, and a balance Fe and unavoidable impurities.
Dependencies are inferred from the claim text.